Pump mechanism



P. OSTENBERG.

PUMP MECHANISM.

APPLICATION FILED JUNE 8, I920 Patented May24,1921.

FIGURE 4- FIGURE 5 2 MM WERI I 3 m lIIll m H F 5 5 a 41 4 8 INVENTQRFIGURE 1 ATTORNEY UNITED STATES OFFICE.

PUMP MECHANISM.

To all whom it may concern:

Beit known that 1, Forums OSTENBERG, a citizen of the United States, andresident of San Jose, in the county of Santa Clara and State ofCalifornia, have invented certain new and useful Improvements in PumpMechanisms, of which the following is a specification.

My invention relates particularly to casing construction for centrifugalpump shafts where two concentrically arranged casings are used, namely,a shaft casing and a discharge casing.

The object of my invention is to provide a casing construction that willeliminate a large number of the parts ordinarily required in casingconstruction; that will be simple in form and cheap to manufacture; thatwill maintain the required alinement of both shaft and casings; thatwill practically eliminate vibration of the shaft; in which the shaftbearings are independent elements slidably inserted in the shaft casing;in which the nonvibrating characteristics of the whole casing areembodied in each casing section; and, finally, it is an object of myinvention to so'secure the shaft and discharge casing sections togetherthat the former is held under tension by the latter whereby thenonvibrating characteristics are secured.

In the drawing:

Figure 1 is a vertical section through a portion of a deep wellcentrifugal pump construction embodying my invention.

Fig. 2 is an enlarged sectional view of a portion of the pump mechanismshown in Fig. 1.

Fig. 3 is a sectional view on line 3--3 of Fig. 2.

I Fig. 4 is an enlarged: sectional view of a portion of the pump shownin Fig. 1 illustrating another embodiment of my invention.

Fig. 5 is asectional view on line 5-5 of Fig. 4.

In carrying out one embodiment of my invention I first provide adischarge casing section 1 and a shaft casing section 2. These twocasings are concentrically arranged with relation to each other andspaced and vheld bywebs 3 welded edgewise first Specification of LettersPatent.

t0 the discharge casing section 1 and then to shaft casing section 2,after sufficiently heating the latter to cause it to expand somewhatthroughout its length. After the two sections are welded to webs 3 ateach end the heated section 2 is allowed to cool. Since in the coolingof section2 it tends to contract again to its normal conditlon but isheld at both ends by webs 3 secured to section 1, the portion betwen theterminal webs 3 is subjected to a tensional strain that holds it tautand consequently the amplitude of any vibrations imparted to it isreduced in proportion to the degree of stress to 3 may be welded tosection 2 first and finally to section 1 if so desired.

These double casing sections are incorporated in the pump mechanism inthe follow manner, the two sections being of substantially the samelength and the section 1 bgipg externally threaded at each end as aFirst I provide a number of lignum-vitee bushings 5 and slidably insertthem in section 2 as shown, one being inserted half way in each endthereof and one or more intermediate its length and held in position byfrictional contact with the section. The lower end of one section 1 isscrewed into pump bowl 6 as at 7, the shaft 8 passing through bushings5. A second double section having a collar 9 threaded on to its lowerendis now placed over shaft 8 with thelower end of section 2 engagingthe pro- Patented May 24:, 1921. 7

Application filed June 8,1920. Serial No. 387,330.

jecting portion of bushing 5 previously inserted in the upper end of thenext lower section 2 and the collar 9 screwed down on to the threadedportion 4 of the next lower section 1. In this way the shaft anddischarge casing sections are built up around shaft 8 to any requiredheight, the Whole being suspended in a Well casing 10 and provided witha discharge head 11 and the shaft with a driving pulley 12.

It is clear that the life and efliciency of a pump depends largely uponthe degree of success attained in eliminating the vibration from thedriving shaft and maintaining the same in perfect alinement. Vibrationnot only subjects the shaft bearings and casing joints to unequalstrains but also causes the operating parts of the pump proper to beWorn down by irregular contact with'the pump bowl. Imperfect alinem'entof the' pump shaft causes unequal distribution of bearing surfacesresulting in irregular and more rapid wearing away of the shaftbearili'gszandof'the shaft itself.

In the invention herein disclosed each bushing is a bearing for theshaft 8. Since the construction described provided a double section inwhich vibration is practically eliminated'from each individual shaftcasing section and consequently in each individual =d-ischargecasingsection, and smce the several discharge casing sections arecoupledimmovably together, it results that the wholeflline .of/doublesections must be held in substantially perfect ialinement andpractically vibrationless, thereby increasing the efficiency andlengthening the effective Working life lofthe mechanism.

'.'In reducing the number of parts to doublecasingrsections, bushingsand collars the labor of construction and assembly is re duced to.-arminimum and a material saving is efiected in material used. v

Another embodiment :is shown in Figs. 4 and 5 in which shaft casingsection 2 is placed under tension in the following manner. I

A coupling 13' is provided and internally threaded at 14: to engagethreaded portion 4 on casing section 1. A bushing is shown at 15supported by coupling 13 through the .mediumof webs 16, and externallythreaded at 17 to engage section 2 internally threaded iasat 18. Theseparts 13-15 and l6ishould be integrally formed in any suit able mannerand the threaded portion 1a provided with more threads to theinch thanthe threaded portion 17, say fifteen and thirteen =respectively. Inassembling the two sections the couplings are screwed intopositionbutthe variation in the threads as Iabovedescribe'd causessection 2 tobe subjectedto aYtensional strainsince the engaging threads "1 l-*4 willdraw the parts together less rapidly than the engaging threads'1 718. VAsshown the parts 15 pro- :vide bearings for shaft 8 and theia'djacent'couplingsare bolted together at 19.

It is understoodof course that webs 3 may be' -.provided "in :anysuitable number, arranged in :any suitable manner, and secured orattahedtosections 1 .and'2 in any suitable mannerr-tosecure the resultsdesired.

construction and assembly may be made within the scope of the appendedclaims.

I claim:

1. An article of manufacture comprising a discharge casing section and ashaft casing section arranged therein and supported under tensionthereby.

2. Anarticle of manufacture comprising a discharge casing section and ashaft casing section arranged therein, and means carried by saiddischarge casing section for supporting said shaft casing section undertension.

3. An article of manufacture comprising integrally formed discharge andshaft casing sections.

4-. An articleof manufacture comprising integrally formed discharge andshaft casing sections, the shaft'casing section being under greatertensional strain than the discharge casing section.

5. An article of manufacture comprising a discharge casing section, ashaft casing section arranged therein, and a plurality of radiallyarranged webs connecting the adjacent ends of said sections and formedintegrally therewith.

6. An article of manufacture comprising a discharge casing section, ashaft casing section arranged therein, and a plurality of radiallyarranged webs connectingthe adjacent ends of said sections and formedintegrally therewith and maintaining said shaft casing section undertension.

7. An article of manufacture comprising a discharge casing section, ashaft casing section arranged therein, and-a plurality of radiallyarranged webs connecting the adjacent ends of said 7 sections and weldedthereto and maintaining said shaft casing sections under tension.

8. A pump mechanism including a discharge casing section comprising aplurality of'connected discharge casing sections, a pump supported bysaid casing, a pump shaft in said casing, a shaft casing sectionsupported under tension by each discharge casing section, a plurality ofshaft bearings arranged in said shaft casing, and shaft bearingsconneetlng the ad acent ends of said shaft casingsections.

joining the adjacent ends of the two sections, and finally allowing theexpanded shaft casing section to cool.

11. The method of constructing a double casing section for pumpmechanism, which 12. An article of manufacture comprisin consists inexpanding a shaft casing section a discharge casing section, a plurality0 within a discharge casing section by the apwebs formed integrallytherewith, a shaft 10 plication of heat thereto then permanently casingsection supported by said webs, and joining the adjacent ends of the twosections bearings supported by said shaft casing by welding connectingwebs thereto, and section.

finally allowing the expanded shaft casing section to cool. PONTUSOSTENBERG.

